单项选择题
（）communication are intership VHF radio telephone communication.
A.ship-to-shore B.shore-to-ship C.bridge-to-bridge
单项选择题 The INMARSAT system is open for use by（）countries on a non-discriminatory basis.
单项选择题 Within the polar areas it is（）to see a satellite in geostationary orbit.
单项选择题 The position of INMARSAT AOR-W satellite is（）above the equator.
